don't know what they will give the 6, but Rob, Rudy, and JS benz did my v8 a little over a year ago. I went from 11.05 to 10.8 then we went with 3" exhaust to the srt 6 muffler ,,,i went to 10.7 then the killer chiller it went to 10.6 so you can see the headers made the best improvement , and these are much better than i have. IF I EVER BUY A SRT6 SIX that is i will have these headers on it. jim


I don't do dyno's